How long can you stand being outside in short-sleeves? (most, sunny, windchill)

[irlinit]

80 F (27 C): as long as I can
70 F (21 C): as long as I can
60 F (16 C): If sunny, as long as I can. If cloudy and windy, 15 minutes
50 F (10 C): 5 minutes
40 F (4 C): 1 minute
30 F (-1 C): No
20 F (-7 C): No
10 F (-12 C): Not experienced a temperature this cold
0 F (-18 C): Not experienced a temperature this cold
-10 F (-23 C): Not experienced a temperature this cold
-20 F (-29 C): Not experienced a temperature this cold

Actually at work I have to walk into a walk in freezer at -18C in my short sleeves and it isn't too bad, actually nice sometimes as it gets hot running around the kitchen which is boiling.. but I doubt I would say the same if I just walked into it normally

[EverBlack]

Originally Posted by iNviNciBL3

80 °F (27 °C): as long as I can
70 °F (21 °C): as long as I can
60 °F (16 °C): as long as I can
50 °F (10 °C): as long as I can
40 °F (4 °C): as long as I can
30 °F (-1 °C): as long as I can
20 °F (-7 °C): 1/2 hour
10 °F (-12 °C): 15 minutes
0 °F (-18 °C): 10 minutes
-10 °F (-23 °C): 5 minutes
-20 °F (-29 °C): couple minutes

But that is only if the sun is out... the sun hitting your skin on a bone chilling day actually feels pretty nice.

This is impressive! You sure are cold proof! A couple of minutes with -20 °F windchill? That's extreme! I feel the same pain as touching a hot metal with that windchill and I can only last a few seconds before my hands turn red D: I could never last as long as you do!

Originally Posted by MeteoMan

It has to be 25°C or warmer for me to do that at all. And we only reach as hot as that one two days a year on average here.

Are you serious? This is quite the opposite as the one before. Impressive as well the world is really various!

[Infamous92]

80 °F (27 °C): as long as I can
70 °F (21 °C): as long as I can (winter), about an hour (summer)
60 °F (16 °C): maybe an hour or two (winter), a minute or two (summer)
50 °F (10 °C): maybe a minute or two
40 °F (4 °C): 30 seconds
30 °F (-1 °C): 20 seconds
20 °F (-7 °C): 10 seconds
10 °F (-12 °C): 5 seconds
0 °F (-18 °C): no time at all
-10 °F (-23 °C): no time at all
-20 °F (-29 °C): no time at all

I actually went out in a t-shirt in 9F weather this past winter, it was nighttime and the wind wasn't blowing (shockingly), it only lasted a couple of seconds, and it wasn't horrible, but it wasn't enjoyable either. It was the lowest temperature I've experienced (so far).

[The East Frisian]

First of all this depends on factors like sunshine, wind, precipitation etc.
But under ideal conditions

80 °F (27 °C): as long as I can
70 °F (21 °C): as long as I can
60 °F (16 °C): as long as I can
50 °F (10 °C): as long as I can in winter, 30-45 minutes in summer
40 °F (4 °C): for 10-15 minutes
30 °F (-1 °C): for 1-2 minutes
20 °F (-7 °C): for 10-20 seconds
10 °F (-12 °C): for 1-2 seconds
0 °F (-18 °C): Never tried
-10 °F (-23 °C): Never experienced
-20 °F (-29 °C): Never experienced

[krmb]

Down here, it would be hard to stand the heat outside even if you were soaking wet and / or naked in the summer.

[micC]

It would actually depend on activity.

Theoretically, I could stay outside in 4C weather for an almost unlimited amount of time, but it would also be uncomfortable within a few minutes. Football players play an entire match in short sleeves and shorts, in 4 degree weather and colder. I think that I've been out in -30C temperature wearing thin clothes, but not short sleeves for my short walk to work (when I was working at a hotel in the Canadian rockies). So I could probably do that with short sleeves. However, when I went to New York City last winter, there was a fierce wind, and even temperatures slightly below freezing were unbearable for more than a few minutes.

Based on light activity (eg walking), here are my estimates:

80F (27C) - As long as I can
70F (21C) - As long as I can
60F (16C) - As long as I can
50F (10C) - A couple of hours
40F (4C) - About half an hour
30F (-1C) - About 15 minutes
20F (-7C) - About 10 minutes
10F (-12C) - About 5 minutes
0F (-18C) - A couple of minutes
-10F (-23C) - A couple of minutes
-20F (-29C) - A couple of minutes

[tenkier7]

80 °F (27 °C): over 6 hours
70 °F (21 °C): as long as I can
60 °F (16 °C): as long as I can
50 °F (10 °C): as long as I can
40 °F (4 °C): over 3 hours
30 °F (-1 °C): over 2 hours
20 °F (-7 °C): for 30~45 minutes
10 °F (-12 °C): for 15~20 minutes
0 °F (-18 °C): for 3~5 minutes
-10 °F (-23 °C): for 60~90 seconds (estimation, not experienced)
-20 °F (-29 °C): for 30~60 seconds (estimation, not experienced)

[mainebrokerman]

all the above,,,i can be in 50 f weather in a t shirt all day long

[Jas182]

110 °F (43°C): Think I'll just go to an air-cooled cinema!
100 °F (38°C): BEACH and shirt off
90 °F (32°C): F the shirt, time to get it off!
80 °F (27 °C): As long as I can
70 °F (21 °C): If Sunny, as long as I can. If cloudy, depends on humidity I guess...
60 °F (16 °C): depends, if Spring and sunny then all day, if not, then, Forget it
50 °F (10 °C): Forget it
40 °F (4 °C): Forget it
30 °F (-1 °C): Forget it
20 °F (-7 °C): Forget it
10 °F (-12 °C): Never Experienced
0 °F (-18 °C): Never Experienced
-10 °F (-23 °C): Never Experienced
-20 °F (-29 °C): Never Experienced

[arleigh]

80 °F (27 °C): No shirt required
70 °F (21 °C): No shirt required
60 °F (16 °C): as long as I want
50 °F (10 °C): as long as I want
40 °F (4 °C): long as I'm busy, all day.
30 °F (-1 °C): Long as I'm busy 3-4 hours at a time.
20 °F (-7 °C): If I'm shoveling snow or splitting wood I don't notice it.
10 °F (-12 °C): light work an hour , heavier work longer
0 °F (-18 °C): 10 minuets or so depending on the emergency.
-10 °F (-23 °C): not in a T shirt
-20 °F (-29 °C): not in a t shirt

Just before winter starts I begin taking apple cider vinegar every day
1 It kills bacteria, and I don't get colds usually.
2 Seems to help with circulation and so my extremities do not get cold very fast.
I worked in a ski area and ran snow making all night long all winter long.
When I worked in the marina during the winer, the shop was not heated, and often we were rescuing sinking boats from snow and slush .
Way too much fun.
I raised my family in the mountains and they simply cannot stand the heat ,and thrive in the cold.